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Insulation in Cortland: July highs average about 83°F; January lows average about 14°F.
In DeKalb County, July highs average about 83°F and January lows about 14°F, with roughly 38 inches of rain a year. Long, cold winters put furnaces and pipes to the test.
Over the last 10 years the National Weather Service recorded damaging thunderstorm winds, hailstorms and tornadoes in DeKalb County, with hail up to 2.75 inches across. After a storm, a quick roof and gutter check catches damage before it turns into a leak.
DeKalb County has had 8 federal disaster declarations in the last 25 years, most often for severe storms; the latest was Covid-19 Pandemic (2020).
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Uneven rooms, high bills and an attic you can see the joists in are the signs; older homes often have far too little.
Attic insulation and air-sealing usually pay back fastest.
These are DeKalb County figures — more about homes in DeKalb.
DeKalb · Sycamore · Maple Park · Virgil · Malta · Burlington · Genoa · Kaneville